Block Energy Design Green Building Consulting and Verification Energy Compliance (Title-24) Energy Efficiency Optimization For LEED, Savings by Design, GreenPoint Rating, New Solar Homes Partnership Certified HERS & GreenPoint Rater for New and Existing Construction LEED for Homes Whole House Energy Ratings/Audits for Existing Homes 1
Impact of U.S. Buildings on the Environment Energy 65% of the Total lus U.S. Electricity i Consumption 30% of U.S. Greenhouse Gas Emissions Resources 136 Million tons of construction and demolition waste 40% (3 billion tons annually) of global raw materials Water 12% of Potable water use in the U.S. 2
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Title 24 or the California Building Energy Efficiency Standards For the past 30 years, while per capita electricity consumption in the US has increased by nearly 50 percent, California electricity use per capita has been approximately flat. This achievement is the result of continued progress in cost-effective building and appliance standards and ongoing enhancements to efficiency programs. Since the mid-1970s, California has regularly increased the energy efficiency requirements for new appliances sold and new buildings constructed here.
It s about Global Climate Change AB 32 California Global Warming Solutions Act of 2006 State must develop a plan to reduce GHG to 1990 levels by 2020 About Rapidly Advancing Energy Efficiencyi Using the Building Standards and Appliance Standards as a Tool To Bring About Change 5
Energy Standards Called Upon to Deliver Reduced Energy Bills Reduced Air Pollution Reduced Greenhouse Gas Emissions Increased Energy System Reliability Increased Comfort Improved Indoor Air Quality Reduced Construction Defects 6
What is Title 24? Part of the California Code of Regulations Title 20 is the Appliance standards Title 24, Part 1 is the Administrative Regulations Title 24, Part 6 is the Building Energy Efficiency Standards for Residential and Nonresidential buildings 7
Who s involved in the Process Building department is the enforcement agency. HERS rater also assist in this function. Energy Analyst provides energy compliance documents (usually computer performance method) HERS Rater CEC certified Third Party verification or like a special Inspector 8
Prescriptive vs. Performance Performance method or computer modeling is most commonly used Based on Annual Energy usage in Btu/sq.ft./year Allows trade offs of energy features for construction flexibility Prescriptive method good for additions 9
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What s in an Energy Analysis? Building Envelope Insulation of roof, walls, floor, air infiltration, radiant barriers Fenestration (or Windows) U-factor, SHGC Space heating system Efficiency of the heating unit, distribution system (air ducts or hydronic radiant), tight duct system Water heating- storage type, on-demand demand, solar Does not include lighting & appliances 11
HERS & Energy Compliance 12
Energy Efficiency Standards and HERS I HERs credits are included in the energy code such as quality of insulation installation, duct testing, air infiltration Energy code provides basis for many programs such as Energy Star, LEED for Homes, GreenPoint Rated, New Solar Homes Partnership 13
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CF-6R Installation Certificate 15
CF-4R HERS Verification 16
Energy Star New Homes Homes must be 15% better than California Energy Code Must be inspected by a CEC certified third party HERS Rater Ductwork must test t out at 6% or less of total air flow (tight duct system) Thermal Bypass Checklist for Insulation 17
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New Solar Homes Partnership Energy Efficiency First 15% better than Standard Design Energy Budget Expected Performance Based Incentive for PV Field Verified Performance of Energy Efficiency and Photovoltaic 23
The Opportunity -HERS II Over 13 million residential units 70% of the existing housing stock was built before 1978 with limited energy efficiency measures Large potential for energy efficiency i improvements 24
Tools of the Trade Energy audit/survey Energy modeling Duct Testing Blower Door testing Combustion Safety Backdraft test Report results HERS index 25 25
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www.energy.ca.gov Title 24 Building Standards Compliance Manuals New Solar Homes Partnership www.gosolarcalifornia.org HERS organizations www.cheers.org WWW.CBPCA.ORG WWW.CALCERTS.COM Green Building Organizations www.builditgreen.org www.usgbc.org g 28